Argv-转换为整数 [英] Argv - String into Integer
本文介绍了Argv-转换为整数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是python的新手,我一直在玩argv.我在这里编写了这个简单的程序,并显示一条错误消息:
I'm pretty new at python and I've been playing with argv. I wrote this simple program here and getting an error that says :
TypeError:%d格式:需要数字,而不是str
TypeError: %d format: a number is required, not str
from sys import argv
file_name, num1, num2 = argv
int(argv[1])
int(argv[2])
def addfunc(num1, num2):
print "This function adds %d and %d" % (num1, num2)
return num1 + num2
addsum = addfunc(num1, num2)
print "The final sum of addfunc is: " + str(addsum)
当我运行filename.py 2 2时,argv是否将2 2放入字符串中?如果是这样,如何将它们转换为整数?
When I run filename.py 2 2, does argv put 2 2 into strings? If so, how do I convert these into integers?
感谢您的帮助.
推荐答案
sys.argv
确实是字符串列表.使用int()
函数将字符串转换为数字,前提是可以转换字符串 .
sys.argv
is indeed a list of strings. Use the int()
function to turn a string to a number, provided the string can be converted.
您需要分配结果,但是:
num1 = int(argv[1])
num2 = int(argv[2])
或简单地使用:
num1, num2 = int(num1), int(num2)
您确实调用了int()
,但忽略了返回值.
You did call int()
but ignored the return value.
这篇关于Argv-转换为整数的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文